## Reflection: Lesson Planning Lines and Line Segments - Section 2: Teaching the Lesson

I planned this lesson based upon what I understood that students had covered in first grade for measurement. The term I thought they had been introduced to was segment, but no one was able to come up with the word, and even when we had the word, no one knew what a segment was. I had to adapt the lesson to explain what a segment was.

The thing I didn't think they had covered in first grade was the naming of end points of line segments. When I pointed out the lines with points and labels at the end, the students knew right away that lines were named by their end points.

I did not need to teach this portion of the lesson.

It is important when I am teaching that I watch how students react to what I am teaching. I constantly ask myself, "Does anyone know what I am talking about?" "Does everyone already know this?" "Do some students grasp what I am teaching, while others have no idea?" Each of those questions causes me to think about how I might need to adapt the lesson, even during the lesson, in order to best meet the needs of my students.

Prior Knowledge
Lesson Planning: Prior Knowledge

# Lines and Line Segments

Unit 15: Geometry
Lesson 1 of 7

## Big Idea: Common Core expectations for second grade are that students will be able to measure a line segment, record the length in appropriate units, and add and subtract to compare the lengths of the lines.

Print Lesson
2 teachers like this lesson
Standards:
Subject(s):
Math, Measurement, Measurement Tools, Geometry, shapes, attributes
60 minutes

### Beth McKenna

##### Similar Lessons

###### Measurement: The skill of how long, how big, how small, how much?
2nd Grade Science » Inquiry in Science
Big Idea: Measurement is a tool that can makes life easier.
Favorites(9)
Resources(16)
East Wenatchee, WA
Environment: Suburban

###### That's Not a Plant, It's a Weed! Discovering Functions of External Plant Parts; What Makes a Plant a Plant?
4th Grade Science » Plants: Structures and Processes
Big Idea: Using data and prior knowledge, students use Educreations to explain their observations, measurements and understanding of various plant's external parts and how they help the plant survive in its environment.
Favorites(22)
Resources(27)
Genoa City, WI
Environment: Rural